Rollable Display Spiral Rail Guide Mechanism
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Solution Overview
Problem
Existing rollable display devices face challenges in uniformly rolling and storing flexible display panels due to uneven rotation, which can lead to the panel becoming stuck or biased within the housing, causing defects and limited display area.
Innovation Solution
The rollable display device incorporates spiral-shaped rails and guide parts within the housings to control the rotation of the flexible display panel, ensuring uniform rolling and preventing the panel from becoming stuck or biased, by using guide parts that move along the rails and are stopped by barrier parts to limit rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible display panel is rolled without spiral rails and guide parts, then the device structure is simpler, but the panel becomes stuck or biased within the housing causing defects
Solution Approach 1:
The spiral rail acts as an intermediary guide structure between the rotation member and the flexible display panel. The guide part, which moves along the spiral rail, serves as a mediator to control and regulate the rolling motion, preventing the panel from becoming stuck or biased while maintaining uniform winding throughout the housing.
Solution Approach 2:
The spiral-shaped rail introduces a curved geometric path that guides the rotational movement of the flexible display panel. This curved geometry ensures uniform wrapping around the rotation member, preventing localized stress concentrations and biasing that would occur with straight or angular guide paths.
2Ease of operation
If the guide part can move freely along the rail, then the panel can be rolled easily, but the panel may roll too far or not be properly limited in rotation
Solution Approach 1:
The barrier parts are pre-positioned at predetermined locations along the spiral rail to define the maximum rotation limits before the rolling operation begins. These pre-set barriers ensure that the guide part—and consequently the flexible display panel—cannot rotate beyond safe limits, preventing over-rolling or improper positioning while allowing easy operation within the defined range.
3Adaptability or versatility
If the first and second housings are spaced apart, then the display panel can be fully spread and displayed, but the device occupies more space
Solution Approach 1:
The housing is segmented into multiple separate housings (first housing and second housing) that can be spaced apart from each other. This segmentation allows the flexible display panel to be fully deployed and displayed across the separated housings, maximizing the display area while maintaining a compact form factor when the panel is in a rolled state.
Data Source
AI summary
A rollable display device includes a flexible display panel that displays an image, a first housing, inside which a first portion of the flexible display panel is storable, a second housing, inside which a second portion of the flexible display panel is storable, a first rotation member inside the first housing, the first portion of the flexible display panel being windable and unwindable on the first rotation member, a second rotation member inside the second housing, the second portion of the flexible display panel being windable and unwindable on the second rotation member, a first rail at one end of the first rotation member, the first rail being defined in the first rotation member to have a spiral shape having two ends, and a first guide part penetrating through the first housing and being inserted in the first rail.